The Sieg is a
river in
North Rhine-Westphalia and
Rhineland-Palatinate,
Germany. It is a
right tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...
of the
Rhine.
The river is named after the
Sicambri. It is in length.
The source is located in the
Rothaargebirge
The Rothaar Mountains (german: Rothaargebirge, , also ''Rotlagergebirge''), or Rothaar, is a low mountain range reaching heights of up to 843.1 m in North Rhine-Westphalia and Hesse, Germany.
It is believed that its name must once have been ...
mountains. From here the river runs southwestwards to the city of
Siegen and the hills of
Siegerland
The Siegerland is a region of Germany covering the old district of Siegen (now part of the district of Siegen-Wittgenstein in North Rhine-Westphalia) and the upper part of the district of Altenkirchen, belonging to the Rhineland-Palatinate adjoin ...
, both named after the river. Further west the Sieg valley forms the boundary of the
Bergisches Land (northern) and
Westerwald (southern). The river finally runs through a protected area east of the city of
Bonn.
After passing the cities of
Hennef and
Siegburg, the river flows into the Rhine at the ''Naturschutzgebiet Siegaue'', a protected area immediately to the northeast of the city of Bonn, near
Niederkassel
Niederkassel ( Ripuarian: ''Neddekaaßel'') is a town in the Rhein-Sieg district, in North Rhine-Westphalia, Germany, with a population of around 37,000 people. It is situated on the right bank of the Rhine, approx. north-east of Bonn and south ...
/.
Sieg Spring

The Sieg Spring (german: Siegquelle), the source of the Sieg, is at an elevation of , near the village of , North Rhine-Westphalia. The location was restored in 2013.
Tributaries
The main tributaries of the Sieg are, from source to mouth:
*
Ferndorfbach (right)
*
Weiß
Weiss or Weiß may refer to:
People
* Weiss (surname), including spelling Weiß
* Weiss Ferdl (1883-1949), German actor
Places
* Mount Weiss, Jasper National Park, Alberta, Canada
* Weiss Lake, Alabama
* Weiß (Sieg), a river in North Rhine-West ...
(left)
*
Asdorf (right)
*
Heller (left)
*
Wisser Bach (right)
*
Nister (left)
*
Bröl (right)
*
Wahnbach (right)
*
Pleisbach (left)
*
Agger Agger may refer to:
* Agger (surname)
* Agger (ancient Rome), a type of ancient Roman rampart or embankment
* Agger (river), a river in North Rhine-Westphalia, Germany
* Agger nasi, an anatomical feature of the nose
* Agger Rockshelter, in Wisconsi ...
(right)
See also
*
List of rivers of North Rhine-Westphalia
*
List of rivers of Rhineland-Palatinate
References
Rivers of North Rhine-Westphalia
Rivers of Rhineland-Palatinate
Rivers of Siegerland
Rivers of the Westerwald
Rivers of Germany
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